- Fri May 24, 2013 9:20 pm
#159824
Hello!
I have a 555 timer in astable mode driving a NPN Transistor
this one:
http://www.jameco.com/webapp/wcs/stores ... _211385_-1
When I hook this up to an led to test it this works perfect, but when I try to hook it up to the car the transistor just gets really hot and the lights don't flash. I tested and the lights use 5.5A (per side) I had a 1k ohm base resistor I tried changing it to 330 ohms with no affect.
Also, I am confused why the lights don't even blink, getting really hot I can understand but current is obviously flow why not even a little light??
Any ideas would be greatly appreciated!
Thanks,
Doss
I have a 555 timer in astable mode driving a NPN Transistor
this one:
http://www.jameco.com/webapp/wcs/stores ... _211385_-1
When I hook this up to an led to test it this works perfect, but when I try to hook it up to the car the transistor just gets really hot and the lights don't flash. I tested and the lights use 5.5A (per side) I had a 1k ohm base resistor I tried changing it to 330 ohms with no affect.
Also, I am confused why the lights don't even blink, getting really hot I can understand but current is obviously flow why not even a little light??
Any ideas would be greatly appreciated!
Thanks,
Doss